LanguageFeatures/Extension-methods/syntax_name_t04.dart

/*
 * Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion an extension declaration is a top-level declaration with a grammar
 * similar to:
 * <extension> ::=
 *   `extension' <identifier>? <typeParameters>? `on' <type> `?'? `{'
 *     memberDeclaration*
 *   `}'
 * Such a declaration introduces its name (the identifier) into the surrounding
 * scope. The name does not denote a type, but it can be used to denote the
 * extension itself in various places. The name can be hidden or shown in import
 * or export declarations.
 *
 * @description Check that the name  can be hidden or shown in import or export
 * declarations.
 * @author sgrekhov@unipro.ru
 */
// SharedOptions=--enable-experiment=extension-methods

import "../../Utils/expect.dart";
import "my_fancy_list_lib.dart" show MyFancyList;

main() {
  List<String> list = ["Lily", "was", "here"];
  Expect.equals(6, list.doubleLength);
  Expect.listEquals([["Lily"], ["was", "here"]], list.split(1));
  Expect.listEquals([["here"], ["was", "Lily"]], -list.split(1));
  Expect.equals("List", MyFancyList.className);
}